Carpet knife



FIG. 1 is a perspective view of a first embodiment of a carpet knife of my new design, the blade therein being shown in phantom lines for illustrative purposes and forming no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front end view thereof; and

FIG. 7 is a rear end view thereof.

FIG. 8 is a perspective view of a second embodiment of a carpet knife of my new design, the blade therein being shown in phantom lines for illustrative purposes and forming no part of the claimed design;

FIG. 9 is a top plan view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a front end view thereof; and,

FIG. 14 is a rear end view thereof.

The stippled areas in the Drawing are intended to represent slip-resistant surfaces. 

The ornamental design for a carpet knife, as shown and described. 